锻压技术

基于OptiStruct的开卷机主轴疲劳特性优化设计

英文标题：Optimal design on fatigue property of uncoiler spindle based on OptiStruct

作者：李传江尹松海毕梦然宋马军

分类号：TG385

出版年,卷(期):页码：2018,43(1):140-145

摘要：

为改善6 t级开卷机主轴在交变应力作用下引起的应力疲劳现象，运用OptiStruct对开卷机主轴的实际工况进行静力学分析，基于HyperMesh对其进行有限元前处理，运用Gerber法进行疲劳分析，并基于OptiStruct的应力雨流计数法和Miner理论求得开卷机主轴的疲劳损伤量和疲劳寿命。以主轴柔度最小化为目标函数，以疲劳寿命为约束条件，构建开卷机主轴的优化模型，并通过OptiStruct进行优化求解得到开卷机主轴的最佳形状。通过优化前后的力学和疲劳特性对比可得：优化后的开卷机主轴危险部位，应力集中现象降低的同时，疲劳寿命也显著提升。基于形状优化设计对开卷机主轴进行尺寸改进，有利于其力学、疲劳性能的改善，为改进开卷机主轴结构设计提供了理论依据。

In order to improve the stress fatigue phenomenon caused by alternating stress of 6 ton uncoiler spindle, the actual working condition of uncoiler spindle was analyzed by static analysis of software OptiStruct, and the finite element pre-processing was carried out based on software HyperMesh. Then, the fatigue analysis was conducted by software Gerber, and the fatigue damage and fatigue life of uncoiler spindle were obtained based on stress rain flow counting method of OptiStruct and Miner theory. Therefore, the optimal model of uncoiler spindle was constructed taking the minimization of spindle flexibility as the objective function and the fatigue life as the constraint condition, and the optimal shape of uncoiler spindle was obtained based on OptiStruct. The comparison of mechanical and fatigue properties before and after optimization shows that its stress concentrate phenomenon decreases and its fatigue life increases significantly in the dangerous area of uncoiler spindle after optimization. Thus, based on shape optimization, the optimized size of uncoiler spindle is advantageous to the improvement of its mechanical and fatigue properties and provides a theoretical basis on structure design of uncoiler spindle.

基金项目：

作者简介：李传江（1995-），男，本科，E-mail：chuanjiang_li@163.com；通讯作者：宋马军（1990-），男，硕士，讲师，E-mail：smjwade@sina.com

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